soc/amd/picasso: Stub out bootblock

Remove all Picasso bootblock support.  CAR is not a supportable
feature, and the first code executed at the reset vector will be
a hybrid romstage.  Details for this implementation may be found
in Documentation/soc/amd/picasso/family17h.md.

TEST=None
BUG=b:130804851

Signed-off-by: Martin Roth <martinroth@chromium.org>
Change-Id: I8edf45c02dc5bfcdca03abf1294db4be508682cf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32413
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

3 files changed, 26 insertions, 114 deletions

diff --git a/src/soc/amd/picasso/Makefile.inc b/src/soc/amd/picasso/Makefile.inc
index bb24c67b05..e8c022fcda 100644
--- a/src/soc/amd/picasso/Makefile.inc
+++ b/src/soc/amd/picasso/Makefile.inc
@@ -37,17 +37,12 @@ subdirs-y += ../../../cpu/x86/mtrr
 subdirs-y += ../../../cpu/x86/pae
 subdirs-y += ../../../cpu/x86/smm
 
-bootblock-$(CONFIG_STONEYRIDGE_UART) += uart.c
+# TODO: Make coreboot modifications so bootblock can be removed.  This soc
+#       also selects C_ENVIRONMENT_BOOTBLOCK to enforce certain codepaths
+#       in romstage.  As a result, the bootblock build also needs a
+#       dummy cache_as_ram.S
+bootblock-y += cache_as_ram.S
 bootblock-y += bootblock/bootblock.c
-bootblock-y += gpio.c
-bootblock-y += i2c.c
-bootblock-y += monotonic_timer.c
-bootblock-y += pmutil.c
-bootblock-y += reset.c
-bootblock-y += tsc_freq.c
-bootblock-y += southbridge.c
-bootblock-$(CONFIG_SPI_FLASH) += spi.c
-bootblock-$(CONFIG_HAVE_SMI_HANDLER) += smi_util.c
 
 romstage-y += i2c.c
 romstage-y += romstage.c
diff --git a/src/soc/amd/picasso/bootblock/bootblock.c b/src/soc/amd/picasso/bootblock/bootblock.c
index 9239030d6c..62e4e1589f 100644
--- a/src/soc/amd/picasso/bootblock/bootblock.c
+++ b/src/soc/amd/picasso/bootblock/bootblock.c
@@ -1,9 +1,6 @@
 /*
  * This file is part of the coreboot project.
  *
- * Copyright (C) 2016 Intel Corporation..
- * Copyright (C) 2017 Advanced Micro Devices
- *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; version 2 of the License.
@@ -14,109 +11,9 @@
  * GNU General Public License for more details.
  */
 
-#include <stdint.h>
-#include <assert.h>
-#include <console/console.h>
-#include <cpu/x86/msr.h>
-#include <cpu/amd/msr.h>
-#include <cpu/x86/mtrr.h>
-#include <smp/node.h>
 #include <bootblock_common.h>
-#include <amdblocks/agesawrapper.h>
-#include <amdblocks/agesawrapper_call.h>
-#include <soc/pci_devs.h>
-#include <soc/cpu.h>
-#include <soc/northbridge.h>
-#include <soc/southbridge.h>
-#include <amdblocks/psp.h>
-#include <timestamp.h>
-#include <halt.h>
-
-#if CONFIG_PI_AGESA_TEMP_RAM_BASE < 0x100000
-#error "Error: CONFIG_PI_AGESA_TEMP_RAM_BASE must be >= 1MB"
-#endif
-#if CONFIG_PI_AGESA_CAR_HEAP_BASE < 0x100000
-#error "Error: CONFIG_PI_AGESA_CAR_HEAP_BASE must be >= 1MB"
-#endif
-
-/* Set the MMIO Configuration Base Address, Bus Range, and misc MTRRs. */
-static void amd_initmmio(void)
-{
-	msr_t mmconf;
-	msr_t mtrr_cap = rdmsr(MTRR_CAP_MSR);
-	int mtrr;
-
-	mmconf.hi = 0;
-	mmconf.lo = CONFIG_MMCONF_BASE_ADDRESS | MMIO_RANGE_EN
-			| fms(CONFIG_MMCONF_BUS_NUMBER) << MMIO_BUS_RANGE_SHIFT;
-	wrmsr(MMIO_CONF_BASE, mmconf);
-
-	/*
-	 * todo: AGESA currently writes variable MTRRs.  Once that is
-	 *       corrected, un-hardcode this MTRR.
-	 *
-	 *       Be careful not to use get_free_var_mtrr/set_var_mtrr pairs
-	 *       where all cores execute the path.  Both cores within a compute
-	 *       unit share MTRRs.  Programming core0 has the appearance of
-	 *       modifying core1 too.  Using the pair again will create
-	 *       duplicate copies.
-	 */
-	mtrr = (mtrr_cap.lo & MTRR_CAP_VCNT) - SOC_EARLY_VMTRR_FLASH;
-	set_var_mtrr(mtrr, FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT);
-
-	mtrr = (mtrr_cap.lo & MTRR_CAP_VCNT) - SOC_EARLY_VMTRR_CAR_HEAP;
-	set_var_mtrr(mtrr, CONFIG_PI_AGESA_CAR_HEAP_BASE,
-			CONFIG_PI_AGESA_HEAP_SIZE, MTRR_TYPE_WRBACK);
-
-	mtrr = (mtrr_cap.lo & MTRR_CAP_VCNT) - SOC_EARLY_VMTRR_TEMPRAM;
-	set_var_mtrr(mtrr, CONFIG_PI_AGESA_TEMP_RAM_BASE,
-			CONFIG_PI_AGESA_HEAP_SIZE, MTRR_TYPE_UNCACHEABLE);
-}
 
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 {
-	amd_initmmio();
-	/*
-	 * Call lib/bootblock.c main with BSP, shortcut for APs
-	 */
-	if (!boot_cpu()) {
-		void (*ap_romstage_entry)(void) =
-				(void (*)(void))get_ap_entry_ptr();
-
-		ap_romstage_entry(); /* execution does not return */
-		halt();
-	}
-
-	/* TSC cannot be relied upon. Override the TSC value passed in. */
-	bootblock_main_with_timestamp(timestamp_get(), NULL, 0);
-}
-
-void bootblock_soc_early_init(void)
-{
-	/*
-	 * This call (sb_reset_i2c_slaves) was originally early at
-	 * bootblock_c_entry, but had to be moved here. There was an
-	 * unexplained delay in the middle of the i2c transaction when
-	 * we had it in bootblock_c_entry.  Moving it to this point
-	 * (or adding delays) fixes the issue.  It seems like the processor
-	 * just pauses but we don't know why.
-	 */
-	sb_reset_i2c_slaves();
-	bootblock_fch_early_init();
-	post_code(0x90);
-}
-
-void bootblock_soc_init(void)
-{
-	if (CONFIG(STONEYRIDGE_UART))
-		assert(CONFIG_UART_FOR_CONSOLE >= 0
-					&& CONFIG_UART_FOR_CONSOLE <= 1);
-
-	u32 val = cpuid_eax(1);
-	printk(BIOS_DEBUG, "Family_Model: %08x\n", val);
-
-	bootblock_fch_init();
-
-	/* Initialize any early i2c buses. */
-	i2c_soc_early_init();
+	/* This function is here for building/linking only */
 }
diff --git a/src/soc/amd/picasso/cache_as_ram.S b/src/soc/amd/picasso/cache_as_ram.S
new file mode 100644
index 0000000000..28690628d6
--- /dev/null
+++ b/src/soc/amd/picasso/cache_as_ram.S
@@ -0,0 +1,20 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * TODO:  This is a dummy file for making bootblock build and link.  At some
+ *        point, this should be removed from picasso since bootblock is
+ *        ignored.
+ */
+.global bootblock_pre_c_entry
+bootblock_pre_c_entry: